US11137623B2ActiveUtilityA1

Spectacle lens and spectacles

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Assignee: HOYA LENS THAILAND LTDPriority: Sep 29, 2017Filed: Mar 26, 2019Granted: Oct 5, 2021
Est. expirySep 29, 2037(~11.2 yrs left)· nominal 20-yr term from priority
Inventors:Yoichi Ogo
G02B 5/28G02C 7/10G02B 5/22G02B 1/116G02C 7/104G02B 5/223G02C 7/107G02B 1/115G02B 1/041G02C 7/088G02C 7/108G02B 5/285
54
PatentIndex Score
0
Cited by
33
References
8
Claims

Abstract

The spectacle lens includes a lens substrate including a blue light absorbing compound, and a multilayer film including a metal layer having a film thickness of 1.0 nm to 10.0 nm, wherein a blue light cut ratio is 21.0% or more, an average reflectance in a wavelength range of 400 nm to 500 nm measured on an object-side surface is 1.00% or less, and an average reflectance in a wavelength range of 400 nm to 500 nm measured on an eyeball-side surface is 1.00% or less.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A spectacle lens, comprising:
 a lens substrate including a blue light absorbing compound, and 
 a multilayer film including a metal layer having a film thickness of 1.0 nm to 10.0 nm, wherein 
 a blue light cut ratio is 21.0% or more, 
 an average reflectance in a wavelength range of 400 nm to 500 nm measured on an object-side surface is 1.00% or less, and 
 an average reflectance in a wavelength range of 400 nm to 500 nm measured on an eyeball-side surface is 1.00% or less. 
 
     
     
       2. The spectacle lens according to  claim 1 , wherein a main wavelength measured on the object-side surface of the spectacle lens is in a range of 500.0 nm to 550.0 nm. 
     
     
       3. The spectacle lens according to  claim 1 , wherein a main wavelength measured on the eyeball-side surface of the spectacle lens is in a range of 500.0 nm to 550.0 nm. 
     
     
       4. The spectacle lens according to  claim 1 , wherein
 multilayer films are located on the object-side surface and the eyeball-side surface of the lens substrate, and 
 the multilayer film including a metal layer is a multilayer film located on the object-side surface of the lens substrate. 
 
     
     
       5. The spectacle lens according to  claim 1 , wherein the metal layer is a chromium layer. 
     
     
       6. The spectacle lens according to  claim 1 , wherein the metal layer is a nickel layer. 
     
     
       7. The spectacle lens according to  claim 1 , wherein a luminous transmittance is 80.0% or more. 
     
     
       8. A pair of spectacles comprising the spectacle lens according to  claim 1 .

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References (0)

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